|
|||||
|
|
Pressure-induced crystallization of 1-butyl-3-methylimidazolium hexafluorophosphate |
|
| Authors: | Machiko Shigemi Takahiro Takekiyo Hiroshi Abe |
| Institution: | 1. Department of Applied Chemistry , National Defense Academy , 1-10-20 Hashirimizu, Yokosuka , 239-8686 , Japan;2. Department of Materials Science and Engineering , National Defense Academy , 1-10-20 Hashirimizu, Yokosuka , 239-8686 , Japan |
| Abstract: | We have investigated the pressure-induced crystallization of 1-butyl-3-methylimidazolium hexafluorophosphate (bmim]PF6]) associated with the conformational changes of bmim]+ by Raman spectroscopy. bmim]+ has trans-trans and gauche-trans (GT) conformers of the butyl side chain at ambient pressure. Our result revealed that liquid to solid-phase transition occurs at 0.2–0.4 GPa region, where the GT conformer becomes dominant. We found that the GT dominant state continues up to 4 GPa. |
| Keywords: | ionic liquids pressure-induced phase transition conformation Raman spectroscopy |